document.write( "Question 933285: how many 5 digits numbers are there? \n" ); document.write( "
Algebra.Com's Answer #567796 by AnlytcPhil(1806)\"\" \"About 
You can put this solution on YOUR website!
\r\n" );
document.write( "Two methods to do it:\r\n" );
document.write( "\r\n" );
document.write( "Method 1:\r\n" );
document.write( "\r\n" );
document.write( "There are 99999 positive integers from 1 through 99999.\r\n" );
document.write( "But 9999 of them have 4 or fewer digits.\r\n" );
document.write( "\r\n" );
document.write( "Therefore there are 99999-9999 = 90000 5-digit integers.\r\n" );
document.write( "\r\n" );
document.write( "Method 2:\r\n" );
document.write( "\r\n" );
document.write( "Choose the first digit any of 9 ways, from 1 through 9 inclusive.\r\n" );
document.write( "Choose the second digit any of 10 ways, from 0 through 9 inclusive.\r\n" );
document.write( "Choose the third digit any of 10 ways, from 0 through 9 inclusive.\r\n" );
document.write( "Choose the fourth digit any of 10 ways, from 0 through 9 inclusive.\r\n" );
document.write( "Choose the fifth digit any of 10 ways, from 0 through 9 inclusive.\r\n" );
document.write( "\r\n" );
document.write( "Answer: 9*10*10*10*10 = 90000 5-digit positive integers.\r\n" );
document.write( "\r\n" );
document.write( "Edwin
\n" ); document.write( "
\n" );